Unit 1, Module 1- Communication and Homeostasis Definitions

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Stimulus
Any change in the environment that causes a response
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Response
A change in behaviour or physiology as a result of a change in the environment
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Homeostasis
The maintenance of a constant internal environment, despite external changes
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Negative feedback
A process that brings about a reversal of any change in conditions, ensuring an optimum steady state is maintained while this is done. It is essential for homeostasis.
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Positive feedback
A process that increases any change detected by the receptors. It tends to be harmful and does not lead to homeostasis.
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Ectotherm
An organism that relies on external sources of heat to regulate its body temperature.
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Endotherm
An organism that can use internal sources of heat to maintain its body temperature. Eg, heat generated from metabolism in the liver
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Exergonic reaction
When energy is released in the form of heat as a result of
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Other cards in this set

Card 2

Front

Response

Back

A change in behaviour or physiology as a result of a change in the environment

Card 3

Front

Homeostasis

Back

Preview of the front of card 3

Card 4

Front

Negative feedback

Back

Preview of the front of card 4

Card 5

Front

Positive feedback

Back

Preview of the front of card 5
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